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Aerospace
Special Issues
Laser Manufacturing Technologies for Aerospace Applications
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Laser Manufacturing Technologies for Aerospace Applications

A special issue of Aerospace (ISSN 2226-4310).

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 8409

Special Issue Editors

Dr. Enrico Troiani

E-Mail Website
Guest Editor
Associate Professor, Department of Industrial Engineering, University of Bologna, via Fontanelle 40, 47121 Forlì, FC, Italy
Interests: fatigue & damage tolerance; crashworthiness; composite materials; light alloys; laser shock peening; structural health monitoring
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Claudia Polese

E-Mail Website
Co-Guest Editor
School of Mechanical, Industrial and Aeronautical Engineering, Witwatersrand University, 1 Jan Smuts Avenue, Braamfontein 2000, Johannesburg, South Africa
Interests: fatigue; fracture mechanics; finite element analysis; friction stir welding; laser shock peening; titanium machining

Special Issue Information

Dear colleagues,

The aerospace industry has been constantly looking for new techniques and manufacturing processes to improve strength and reduce weight, in order to enhance performances and lower fuel consumption and costs of aircraft, helicopters, and spacecraft. Moreover, the components in aerospace are usually low in volume, but at the same time, they are labor-intensive, with demanding requirements.

To meet these challenges, laser technology has been adopted from its early days in aerospace because of its many benefits: flexibility in design and manufacturing, lighter components with reduced costs, and more. Laser manufacturing is currently applied in aerospace to process different materials, from metals to polymers up to ceramics, with excellent precision and efficiency.

Conversely, laser manufacturing still faces significant challenges, mostly because of qualification and certification issues of novel techniques, such as laser-based additive manufacturing.

This Special Issue on “Laser Manufacturing Technologies for Aerospace Applications” aims to collect recent advances in applications of laser technology in aerospace. Scientific contribution can be focused on conventional applications of lasers, such as surface treatment, cutting, welding drilling, etc., up to more innovative ones, such as laser-based manufacturing. Furthermore, contribution on characterization methods and numerical approaches to modeling the laser process and material properties (numerical simulations, analytical modelling, optimization, etc.) are welcome.

Suitable topics include but are not limited to:

  • Conventional laser manufacturing (cutting, drilling, welding, etc.);
  • Laser surface treatments (shock peening, hardening, texturing, alloying, etc.);
  • Laser based additive manufacturing;
  • Numerical simulations.

Prof. Dr. Enrico Troiani
Prof. Dr. Claudia Polese
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Aerospace is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • 3D printing
  • Advanced processes
  • Aerospace
  • Design optimization
  • Laser cutting
  • Laser coating
  • Laser drilling
  • Laser welding
  • Laser cladding
  • Laser hardening
  • Laser alloying
  • Laser texturing
  • Laser shock peening
  • Laser additive manufacturing
  • Modelling and simulation

Published Papers (1 paper)

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Research

20 pages, 7031 KiB  
Article
Characterization of Residual Stresses and Grain Structure in Hot Forging of GH4169
by Zibiao Wang, Guangsha Hou, Yang Zhao, Jianfei Sun, Jiangzhen Guo and Wuyi Chen
Aerospace 2022, 9(2), 92; https://doi.org/10.3390/aerospace9020092 - 10 Feb 2022
Cited by 4 | Viewed by 2596
Abstract
Residual stresses (RS) in hot forging severely degrade the machining accuracy and stability of super alloy parts. This is the main reason for deformation during subsequent mechanical machining. RS need recognition, as well as the microstructure and properties achieved by forging. In this [...] Read more.
Residual stresses (RS) in hot forging severely degrade the machining accuracy and stability of super alloy parts. This is the main reason for deformation during subsequent mechanical machining. RS need recognition, as well as the microstructure and properties achieved by forging. In this study, a simulation and experimental research on the single-pass compression of GH4169 are presented. RS variations with forging temperature, loading speed, and cooling speed are established by finite element (FE) simulation. Based on the FE results, an experiment is conducted at a temperature of 1020 ℃, loading speed of 25 mm/s, and press amount of 16 mm, immediately followed by water cooling. A new layer-stripping method is put forward for the high-efficiency measurement and correction of interior RS. Compared with the traditional strain gauge layer-stripping method, the measurement efficiency of the new layer-stripping method is increased by 10 times. Meanwhile, grain photographs are collected and grain size evolution is summarized; thus, the RS is characterized and evaluated from the angle of grains. It is demonstrated that the RS level rises with the increase in forging temperature, loading speed, and cooling speed, while the cooling method influences both the stress value and distribution. Compressive RS changes to tensile, while the average grain size reduces from the surfaces to the center. In the compressive regions, stress values share the same rules as grain size, while, in the tensile regions, they are contrary. The RS levels are divided according to the grain degree standard. According to the residual stress and grain distribution law of the blank, the optimal position of the part in the blank can be determined. Compared with the center position of the part in the blank, the residual stress of the part is reduced by 70%. The results provide useful strategies for the better design of forging technology, qualification examinations, and subsequent mechanical machining. Full article
(This article belongs to the Special Issue Laser Manufacturing Technologies for Aerospace Applications)
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